Tonight's Picks: Tuesday, April 29

Reaper
Sam makes a second deal with the Devil to keep Andi from finding out about his secret satanic job. Meanwhile, Ben gets married under suspicious circumstances, and Michael Ian Black guest stars as Tony the demon.

American Idol
Neil Diamond helps the final five singers butcher his songbook.

Law & Order: SVU
Robin Williams guest-stars as an engineer who poses as a cop to trick people into committing crimes, then mounts an unusual legal defense when caught.